How do you ask what are doing in french?

There are several ways to ask "What are you doing?" in French, depending on the context and level of formality:

Formal:

* Que faites-vous? (This is the most formal way to ask)

Informal:

* Qu'est-ce que tu fais? (This is the most common way to ask in informal situations)

* Tu fais quoi? (This is even more informal and might be used between friends)

* Quoi de neuf? (This literally means "What's new?" but is used to ask "What are you doing?")

* T'es en train de quoi? (This is very informal and means "What are you in the process of doing?")

Example conversation:

Friend: Salut! Qu'est-ce que tu fais?

You: Je regarde un film. Et toi?

Friend: Je suis en train de préparer le dîner.

This translates to:

Friend: Hi! What are you doing?

You: I'm watching a movie. What about you?

Friend: I'm making dinner.

Remember to choose the appropriate phrase based on the person you are talking to and the situation.